/*首页*/
#index {
  width: 100%;
  height: 100%;
  background-color: black;
}
#index #screen1 {
  background: url('../images/home_BG.jpg') no-repeat center;
  background-size: cover;
  width: 100%;
  height: 100%;
  min-width: 1000px;
  min-height: 550px;
  position: relative;
  filter: progid:DXImageTransform.Microsoft.AlphaImageLoader(src='../images/home_BG.jpg', sizingMethod='scale');
}
#index #screen1 .content {
  height: 550px;
  width: 1000px;
  zoom: 1;
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  top: 0;
  margin: auto;
  text-align: center;
  color: white;
}
#index #screen1 .content .title {
  font-size: 48px;
  margin-bottom: 112px;
  opacity: 1;
  font-weight: normal;
}
#index #screen1 .content p {
  font-size: 16px;
  line-height: 22px;
  margin-top: 20px;
  opacity: 0 ;
  animation-fill-mode: forwards !important;
}
#index #screen1 .content .p1 {
  animation: opacityshow 1.5s;
}
#index #screen1 .content .p2 {
  animation: opacityshow 1.5s;
  animation-delay: 2s;
}
#index #screen1 .content .p3 {
  animation: opacityshow 1.5s;
  animation-delay: 5s;
}
#index #screen1 .content .button_open {
  opacity: 0;
  animation-fill-mode: forwards !important;
  animation: opacityshow 1.5s;
  animation-delay: 7s;
}
@keyframes opacityshow {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    bottom: 0;
    transform: translateY(0);
  }
}
#index #screen1 .content .button_open {
  font-size: 24px;
  display: inline-block;
  cursor: pointer;
  margin-top: 108px;
  line-height: 74px;
  text-align: center;
}
/*  不支持css动画 hack   */
.no-cssanimations #index #screen1 p {
  opacity: 1;
}
.no-cssanimations #index .button_open {
  opacity: 1;
}
